学習したことのメモとか、日記とか、備忘録。

/Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/watcher/abstract.rb:30:in `initialize': no implicit conversion of nil into String (TypeError)
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/watcher/abstract.rb:30:in `new'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/watcher/abstract.rb:30:in `block in add'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/watcher/abstract.rb:29:in `map'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/watcher/abstract.rb:29:in `add'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/watcher/polling.rb:20:in `add'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application.rb:102:in `rescue in preload'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application.rb:115:in `preload'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application.rb:143:in `serve'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application.rb:131:in `block in run'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application.rb:125:in `loop'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application.rb:125:in `run'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/gems/2.3.0/gems/spring-1.6.4/lib/spring/application/boot.rb:18:in `<top (required)>'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/mikazuki/.rbenv/versions/2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'